Pump



Dec. 24, 1929. J. CORNET Y OLIVERAS PUMP Filed March 1929 l. W; Attorney.

Patented Dec. 24, 1929 NIT'ED STATES PATENT OFFICE,

PUMP

Application filed March 7, 1929, Serial No. 344,967, and in Spain February 25, 1928.

The pump according to the invention, is simple in construction and operation, and it is valveless, reversible and always available for immediate use. In its operation there is nointermittent flow of liquid, and a minimum expenditure of power is required.

According to the invention, on the whole length of the inner periphery of a cylindrical casing, is arranged a flexible tube of rubher, or other suitable substance of considerable elasticity, the ends of the said tube communicating with the suction and delivery branches of the pump respectively. A driving shaft extends axially into the cylinder and carries, within the cylinder, a supporting member which projects in opposite direction from the shaft toward the inner circumferential wall of the cylinder. Levers are pivoted to the opposite ends of this member and these 2 levers carry at their free ends rollers which are adapted to bear against the resilient tube.

The free end of each lever is connected by a brace rod to the opposite end of the supporting member, and these rods are provided with means for varying their efi'ective lengths to adjust the pressure of the rollers against the tube. As the shaft revolves, the

tube is compressed by the rollers and the fluid is thereby forced out of one end of the tube and drawn in at the other end continu ously.

A pump, constructed according to the invention is illustrated in the accompanying drawings, in which Figure I shows a side View of the pump, partially in section,

Figure II is a side view showing the exterior form of the pump,

Figure III is a section on the line A--B of Figure II,

Figure IV is a lan view of the mechanism,

Figure V is a etail of the turnbuckles.

The invention comprises the construction hereinafter described with reference to the accompanying drawings. Within a cylindrical casing 11, is a central shaft 2, projecting through the fixed side wall 3. The said shaft 2, which is mounted in ball bearings, has on its projecting end a driving pulley 4, 59 and the other end, which is in the interior of the cylindrical casing 1, carries a supporting member 5 which projects radially in opposite directions from the shaft. At the outer ends of the member 5 are arranged studs 6 and 6' on which are pivoted levers 7 and 7, respectively. On the free ends of the levers are mounted compression rollers 8 and 8, adapted to bear against the tube. A brace rod 12 connects the stud 6' on one end of the supporting member with the stud 9 on the free end 01: the lever 7 at the opposite end of said member, and similarly, a brace rod 6 connects the stud 6 on the supporting mem her with the stud 9 on the lever 7. The rod b is provided with a turnbuckle l0, and the rod 6 is provided with a turnbuckle 10'. By means of these turnbuckles, the lengths of the rods can be varied to adjust the pressure of the rollers against the tube. On the whole length of the inner periphery of the casing 1 is arranged and bearing thereupon a strong flexible tube 11 of rubber or other suitable substance. This tube tends quickly to assume its initial cylindrical form after it has been compressed or flattened owing to the powerful elasticity of the thick wall. The ends of this tube project to the outside through openings 12 and 13 in the casing 1, and may cross before doing so. They are in addition connected to the suction and delivery pipes so that no escape of fluid can occur. The simplicity of the construction can be seen from the drawings.

The surrounding air is excluded from the apparatus by means of the wall or cover 1d screwed to the casing 1.

The operation of the pump, in accordance V with the invention is as follows :-The turnbuckles 10 and 10 are so arranged that the rollers 8 and 8 compress the tube 11 until it is completely closed and the flow of fluid through its. interior arrested. The pulley is now driven, and causes rotation of the compression rollers 8 and 8 about the shaft 2. These rollers compress the tube against the cylindrical wall of the casing 1 as they move. The tube 11, owing to its considerable elasticity, tends to assume its initial shape after h so that when the other compression roller asses, this liquid will be driven to the outet and expelled while more liquid will be drawn in by the recurrence of a vacuum on the other side.

It will be understood that the pumping of liquid by this apparatus is independent of the weight of the elevation column, and fur-- thermore that the resistances caused by this weight are greatly reduced by the favourable conditions present.

As the closure of the rubber tube caused by the compression rollers is permanent and complete, the liquid suction column is constant so that the pump will always be responsive and capable of immediate use.

I claim:

1. A pump comprising a cylinder, a tube of resilient material extending around the inner circumferential face of the cylinder and having its ends leading out of the cylinder, a shaft axially mounted in the cylinder,

a support within the cylinder secured to the shaft and projecting radially therefrom in opposie directions, levers pivoted to the ends I of the support, rollers mounted on the free ends of said levers and adapted to bear upon the tube, and rods connecting the free ends of the levers with the opposite ends of the support and adapted to hold the rollers against the tube.

2. A pump comprising a cylinder, a tube of resilient material extending around the inner circumferential face of the cylinder and having its ends leading out of the cylinder,

a shaft axially mounted in the cylinder, a

support within the cylinder securedto the shaft and projecting radially therefrom in opposite directions, levers pivoted to the ends 0 the support, rollers mounted on the free ends of said levers and adapted to bear upon the tube, rods connecting the free ends of the levers with the opposite ends of the support and adapted to hold the rollers against the tube, and turnbuckles on the rods for adjusting their lengths to vary the pressure of the rollers on the tube.

JUAN CORNET Y OLIVERAS. 

